Enter your scale reading in any common unit. Pick a planet or custom gravity value. See mass above the form, then download it fast.
| Body weight | Unit | Gravity (m/s²) | Mass (kg) | Notes |
|---|---|---|---|---|
| 180 | lbf | 9.80665 | 83.914 | Typical scale reading expressed as force. |
| 75 | kgf | 9.80665 | 75.000 | Using kilogram-force gives mass near the number shown. |
| 900 | N | 9.80665 | 91.774 | Direct force measurement in Newtons. |
| 180 | lbf | 1.62000 | 507.807 | Same force value, but lower gravity increases mass result. |
Weight is a force, while mass measures inertia.
This page converts a body weight force into mass with assumptions. Adult scale readings range from 45–120 kgf (about 100–265 lbf). By choosing the correct unit and gravity, you can reproduce a mass number or analyze forces precisely.
Scales usually display a number linked to gravitational force. Mass is the amount of matter, while weight is the pull of gravity on that mass. On Earth, the relationship is close to 1 kg of mass producing about 9.80665 N of weight.
This calculator applies m = W / g. It first converts your input into Newtons, then divides by the selected gravity. If you enter 900 N and use 9.80665 m/s², the mass is about 91.77 kg.
Many people measure weight in pound-force or kilogram-force. The converter uses 1 lbf = 4.4482216153 N and 1 kgf = 9.80665 N. For mass outputs, 1 kg = 2.2046226218 lbm and 1 slug = 14.5939029372 kg.
Gravity varies across bodies. Typical surface values used here are Earth 9.80665, Moon 1.62, Mars 3.711, and Jupiter 24.79 m/s². Because mass depends on the chosen g, using a smaller g yields a larger computed mass for the same force input.
If your scale shows “75 kg”, it is effectively reporting a force equivalent under Earth gravity. Selecting kilogram-force makes the mass result match that familiar number. If you pick pound-force, a “180” scale reading becomes about 800.7 N before the division step.
Engineering notes may require consistent rounding. Choose 0–8 decimals to align with lab sheets or reports. For health or fitness tracking, 1–2 decimals is usually enough. The CSV export preserves full calculated values in a simple key–value layout.
Local g changes slightly with latitude and altitude. The optional estimator uses a latitude-based sea-level model and applies a small height correction of about 3.086×10⁻⁶ per meter. At higher elevations, gravity is slightly lower than at sea level.
Use this calculator to convert force readings from load cells into mass, compare test data between locations, or document assumptions in safety checks. It is also handy for education: keep mass constant and adjust gravity to see why “weight” changes on different worlds.
No. Body weight is a force created by gravity, while mass is the amount of matter. The calculator separates them using m = W / g.
If your scale shows kilograms, select kilogram-force so the result matches the displayed number under Earth gravity. If it shows pounds, select pound-force.
The tool assumes your input is a force. For the same force, a smaller g requires more mass to produce it, so m increases when g decreases.
Yes. Choose Newton (N) or kilonewton (kN) as the weight unit, then enter the measured force. The calculator will divide by your chosen gravity.
Use 0–2 decimals for everyday tracking, and 3–6 decimals for lab notes or engineering reports. Higher precision shows more digits but does not improve measurement accuracy.
A slug is a mass unit in the imperial system. One slug equals about 14.5939 kilograms. It is commonly used in engineering calculations with feet, pounds, and seconds.
It gives an educational approximation based on latitude and altitude. Local geology, terrain, and weather can cause small differences, so use measured gravity when high accuracy is required.
Important Note: All the Calculators listed in this site are for educational purpose only and we do not guarentee the accuracy of results. Please do consult with other sources as well.